Base station



FIG. 1 is a top, front isometric view of a base station showing my new design;

FIG. 2 is a back elevational view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and

FIG. 7 is a top, back, right, perspective view thereof; and,

FIG. 8 is a front, right view thereof. 

CLAIM The ornamental design for a base station, as shown and described. 